Add capability to do a single tag merge
Right now as implemented, you need to select at least 2 tags to merge. However since the target is selected, a single tag merge would be possible.
Example: uillinois merges into illinois.
This is really needed since we have tons of tags and with searching it is nearly impossible to get the tags you want to merge to appear on one or so pages so they can be selected.
Example: uillinis, uiuc, uiuic all merge into illinois